Transport and trapping in two-dimensional nanoscale plasmonic optical lattice.

Chen, Kuan-Yu; Lee, An-Ting; Hung, Chia-Chun; Huang, Jer-Shing; Yang, Ya-Tang · Nano Lett · 2013

basic_science · Level V

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Abstract

We report the transport and trapping behavior of 100 and 500 nm diameter nanospheres in a plasmon-enhanced two-dimensional optical lattice. An optical potential is created by a two-dimensional square lattice of gold nanostructures, illuminated by a Gaussian beam to excite plasmon resonance. The nanoparticles can be guided, trapped, and arranged using this optical potential. Stacking of 500 nm nanospheres into a predominantly hexagonal closed pack crystalline structure under such a potential is also reported.